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Session Report

Summary:
Test run at: 2021-03-09 19:22:07 GMT
Client Prefix (v4): 217.62.74.x/24
Client AS (v4): 33915 (TNF-AS)
IPv4 Probes: 69
Client Prefix (v6): 2001:1c03:48xx::/40
Client AS (v6): 33915 (TNF-AS)
IPv6 Probes: 60
Outbound spoofing summary (from the client to our server)
Source address type IPv4IPv6
Private - RFC1918 or ULA unknownblocked
Routable unknownunknown
Largest spoofable neighbor prefix length none/104
Spoof status key
receivedSpoofed packet was received.Pattern of tests from this IP block indicates a switch from allowing spoofing to blocking it.
rewrittenSpoofed packet was received, but the source address was changed en route.
blockedSpoofed packet was not received, but unspoofed packet was.
unknownNeither spoofed nor unspoofed packet was received.

Warnings:

IPv4 AS Route:
This test run probed the following paths in order to infer your ability to send different spoofed source packets. Each node in the graph corresponds to an autonomous system, i.e. different Internet service providers. NOTE: This graph does NOT show if an AS blocks spoofed packets, only the path taken by received spoofed packets. The IP Path Details are available for this run. If non-spoofed packets weren't received at a destination, the traceroute to that destination is not included in this graph and may even cause a totally empty graph.

  

  

IPv4 Adjacent Netblock Testing:

Your host (217.62.74.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
217.62.74.x/24/3133915sendto
217.62.74.x/24/3033915sendto
217.62.74.x/24/2933915sendto
217.62.74.x/24/2833915sendto
217.62.74.x/24/2733915sendto
217.62.74.x/24/2633915sendto
217.62.74.x/24/2533915sendto
217.62.74.x/24/2433915sendto
217.62.75.x/24/2333915sendto
217.62.72.x/24/2233915sendto
217.62.78.x/24/2133915sendto
217.62.66.x/24/2033915sendto
217.62.90.x/24/1933915sendto
217.62.106.x/24/1833915sendto
217.62.10.x/24/1733915sendto
217.62.202.x/24/1633915sendto
217.63.74.x/24/1515542sendto
217.60.74.x/24/1458224sendto
217.58.74.x/24/133269sendto
217.54.74.x/24/1236992sendto
217.46.74.x/24/112856sendto
217.30.74.x/24/1048574sendto
217.126.74.x/24/93352sendto
217.190.74.x/24/86805sendto

Meaning of status in Received column:

sendtoThe spoofer client was unable to send spoofed headers due to an operating system restriction.

IPv4 Outbound Filtering Depth:

The tracefilter test found your host unable to spoof routable, non-adjacent source addresses through even the first IP hop.
IPv6 probes:
Spoofed source addressDestinationReceived
2001:48d0:101:501::1592001:48d0:101:501::242no
2001:4978:1fb:6400::d22001:48d0:101:501::242no
2001:49aa:111:aa00::112001:48d0:101:501::242no
fd11:1111:1111::11112001:48d0:101:501::242no
2001:48d0:101:501::1592001:48d0:101:501::247no
2001:4978:1fb:6400::d22001:48d0:101:501::247no
2001:49aa:111:aa00::112001:48d0:101:501::247no
fd11:1111:1111::11112001:48d0:101:501::247no
2001:48d0:101:501::1592001:630:212:225:225:90ff:fe0c:45a6no
2001:4978:1fb:6400::d22001:630:212:225:225:90ff:fe0c:45a6no
2001:49aa:111:aa00::112001:630:212:225:225:90ff:fe0c:45a6no
fd11:1111:1111::11112001:630:212:225:225:90ff:fe0c:45a6no
2001:48d0:101:501::1592001:770:1c:7:225:90ff:fe0c:acb4no
2001:4978:1fb:6400::d22001:770:1c:7:225:90ff:fe0c:acb4no
2001:49aa:111:aa00::112001:770:1c:7:225:90ff:fe0c:acb4no
fd11:1111:1111::11112001:770:1c:7:225:90ff:fe0c:acb4no
2001:48d0:101:501::1592001:df0:4:800:21c:c0ff:feb2:ad5fno
2001:4978:1fb:6400::d22001:df0:4:800:21c:c0ff:feb2:ad5fno
2001:49aa:111:aa00::112001:df0:4:800:21c:c0ff:feb2:ad5fno
fd11:1111:1111::11112001:df0:4:800:21c:c0ff:feb2:ad5fno
IPv6 Adjacent Netblock Testing:
Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
2001:1c03:48xx::/40/12033915yes
2001:1c03:48xx::/40/11233915yes
2001:1c03:48xx::/40/10433915yes
2001:1c03:48xx::/40/9633915no
2001:1c03:48xx::/40/8833915no
2001:1c03:48xx::/40/8033915no
2001:1c03:48xx::/40/7233915no
2001:1c03:48xx::/40/6433915no
2001:1c03:48xx::/40/5633915sendto
2001:1c03:48xx::/40/4833915sendto
2001:1c03:48xx::/40/4033915sendto
2001:1c03:c8xx::/40/3233915sendto
2001:1c83:48xx::/40/2433915sendto
2001:9c03:48xx::/40/16UNROUTEDsendto

Meaning of status in Received column:

noPackets spoofed from adjacent netblock were not received, probably due to blocking
yesPackets spoofed from adjacent netblock were received (but that netblock is within the source AS)
sendtoThe spoofer client was unable to send spoofed headers due to an operating system restriction.
Summary:
The results from all tests are aggregated to produce a summary "State of IP Spoofing" report.
Feedback:
We welcome questions and feedback to the Spoofer Information Mailing List and invite users to join the Spoofer Users Mailing List for discussion and announcements.
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